13432729 has 2 divisors, whose sum is σ = 13432730. Its totient is φ = 13432728.

The previous prime is 13432723. The next prime is 13432747. The reversal of 13432729 is 92723431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13104400 + 328329 = 3620^2 + 573^2 .

It is an emirp because it is prime and its reverse (92723431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13432729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13432729.

It is not a weakly prime, because it can be changed into another prime (13432723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6716364 + 6716365.

It is an arithmetic number, because the mean of its divisors is an integer number (6716365).

Almost surely, 2^13432729 is an apocalyptic number.

It is an amenable number.

13432729 is a deficient number, since it is larger than the sum of its proper divisors (1).

13432729 is an equidigital number, since it uses as much as digits as its factorization.

13432729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 13432729 is about 3665.0687578816. The cubic root of 13432729 is about 237.7139951219.

It can be divided in two parts, 1343272 and 9, that added together give a square (1343281 = 1159²).

The spelling of 13432729 in words is "thirteen million, four hundred thirty-two thousand, seven hundred twenty-nine".